avr/qmk/firmware - [no description]

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author	Brian Schott <briancschott@gmail.com>	2019-02-16 00:00:58 -0800
committer	Hackerpilot <briancschott@gmail.com>	2019-02-24 19:49:48 -0800
commit	d093678458ef6e0cb7f4fac1c66df6d3d8f564dd (patch)
tree	208688f23c39b9f44ec8f4ed7729dd8d76d90783 /lib/lufa/Projects/Webserver/USBHostMode.c
parent	2fe21c67c597fbb99ee8fae989e227c3c359a2ca (diff)
download	firmware-d093678458ef6e0cb7f4fac1c66df6d3d8f564dd.tar.gz firmware-d093678458ef6e0cb7f4fac1c66df6d3d8f564dd.tar.bz2 firmware-d093678458ef6e0cb7f4fac1c66df6d3d8f564dd.zip

Update readme.md

Diffstat (limited to 'lib/lufa/Projects/Webserver/USBHostMode.c')

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/** * \addtogroup timer * @{ */ /** * \file * Timer library implementation. * \author * Adam Dunkels <adam@sics.se> */ /* * Copyright (c) 2004, Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file is part of the uIP TCP/IP stack * * Author: Adam Dunkels <adam@sics.se> * * $Id: timer.c,v 1.2 2006/06/12 08:00:30 adam Exp $ */ #include "clock.h" #include "timer.h" /*---------------------------------------------------------------------------*/ /** * Set a timer. * * This function is used to set a timer for a time sometime in the * future. The function timer_expired() will evaluate to true after * the timer has expired. * * \param t A pointer to the timer * \param interval The interval before the timer expires. * */ void timer_set(struct timer *t, clock_time_t interval) { t->interval = interval; t->start = clock_time(); } /*---------------------------------------------------------------------------*/ /** * Reset the timer with the same interval. * * This function resets the timer with the same interval that was * given to the timer_set() function. The start point of the interval * is the exact time that the timer last expired. Therefore, this * function will cause the timer to be stable over time, unlike the * timer_restart() function. * * \param t A pointer to the timer. * * \sa timer_restart() */ void timer_reset(struct timer *t) { t->start += t->interval; } /*---------------------------------------------------------------------------*/ /** * Restart the timer from the current point in time * * This function restarts a timer with the same interval that was * given to the timer_set() function. The timer will start at the * current time. * * \note A periodic timer will drift if this function is used to reset * it. For periodic timers, use the timer_reset() function instead. * * \param t A pointer to the timer. * * \sa timer_reset() */ void timer_restart(struct timer *t) { t->start = clock_time(); } /*---------------------------------------------------------------------------*/ /** * Check if a timer has expired. * * This function tests if a timer has expired and returns true or * false depending on its status. * * \param t A pointer to the timer * * \return Non-zero if the timer has expired, zero otherwise. * */ int timer_expired(struct timer *t) { return (clock_time_t)(clock_time() - t->start) >= (clock_time_t)t->interval; } /*---------------------------------------------------------------------------*/ /** @} */


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